diff --git a/Programming/anaconda/2019.07/conda-env-defs/datascience_py36/datascience_36.yml b/Programming/anaconda/2019.07/conda-env-defs/datascience_py36/datascience_36.yml
index dcb07b9..390e723 100644
--- a/Programming/anaconda/2019.07/conda-env-defs/datascience_py36/datascience_36.yml
+++ b/Programming/anaconda/2019.07/conda-env-defs/datascience_py36/datascience_36.yml
@@ -20,6 +20,7 @@ dependencies:
   - ipywidgets
   - plotly
   - python-graphviz
+  - hdf5storage
 # Note that the dask 2.1.0 with python 3.6 led to a non-functioning configuration
 # (serialization errors in dask). Therefore we exclude it here.
 #  - dask
diff --git a/Programming/anaconda/2019.07/conda-env-defs/datascience_py37/datascience_py37.yml b/Programming/anaconda/2019.07/conda-env-defs/datascience_py37/datascience_py37.yml
index 0f63606..4c475e4 100644
--- a/Programming/anaconda/2019.07/conda-env-defs/datascience_py37/datascience_py37.yml
+++ b/Programming/anaconda/2019.07/conda-env-defs/datascience_py37/datascience_py37.yml
@@ -24,4 +24,5 @@ dependencies:
   - dask-jobqueue
   - python-graphviz
   - bayesian-optimization
+  - hdf5storage